Jin-Hwang and Irwin mango genome resequencing

This study aims to dissect the genetic basis of ascorbic acid (AsA) accumulation in mango fruit by leveraging the phenotypic variation observed between the cultivars 'Jin-Hwang' (low AsA) and 'Irwin' (high AsA). The core of the investigation involves the whole-genome resequencing of these two parental cultivars . The analysis of the resulting genomic data is designed to identify genetic variants, such as single nucleotide polymorphisms (SNPs) and insertions/deletions (InDels), specifically within a previously mapped quantitative trait locus (QTL) region associated with AsA content . A primary goal is to pinpoint candidate genes within this QTL interval and to elucidate the causal mutation, such as the premature termination codon discovered in the MiGST1 gene of 'Jin-Hwang', which is predicted to disrupt gene function. The relevance of this work is substantial for molecular breeding, as establishing a direct link between specific genetic markers or haplotypes and a key fruit quality trait like AsA content paves the way for marker-assisted selection. This strategy can significantly accelerate the development of new mango varieties with enhanced nutritional value.